Is this too big of an ask for a scifi story?

Question on multiple planets in the solar system being habitable. I'm working on something and to set the table, there was an "incident" we'll call it for now. One day, every planet in the solar system experienced seismic activity within its core and as a result, they began changing and becoming habitable. Not every single one, but in time, it appears all of them will eventually be.

Now, why or how this happened will be answered in the long term. But its not the main focus of the story at first. Its just a way to build the world. Instead of made up countries, nations, kingdoms, or other made up planets, I wanted a world where the locations are actually the planets we all know.

My worry is that this is too big of a hurdle to ask people to accept right off the bat. Granted its scifi, and fictional, but my question is, do you think people will be able to enjoy a story, its characters, the world, and everything else, with telling them right at the start that the other planets are becoming habitable like earth?